Description: This version of the 1113 breakout board features an easy-to-use analog output, which will vary depending on the amount of IR light reflected back to the sensor.This tiny board is perfect for line sensing applications and can be used in both 3.3V and 5V systems.The board’s 1113 IR reflectance sensor is comprised of two parts - an IR emitting LED and an IR sensitive phototransistor.When you apply power to the VCC and GND pins the IR LED inside the sensor will illuminate. A 100&; resistor is and placed in series with the LED to limit current. A 10k&; resistor pulls the output pin high, but when the light from the LED is reflected back onto the phototransistor the output will begin to go lower.The more IR light sensed by the phototransistor, the lower the output voltage of the breakout board.These sensors are widely used in line following robots - white surfaces reflect much more light than blackThe power input and analog output pins are brought out to a 3-pin, 0.1" pitch header. The board also has a single mounting hole if you want to screw the board onto something.Size:14mm*7mm*4mmMaterial:PlasticColor:Red Package Includes: 1x breakout board with 1 Pin Header